CVE-2023-53867 (GCVE-0-2023-53867)

Vulnerability from cvelistv5 – Published: 2025-12-24 10:55 – Updated: 2026-01-05 10:33
VLAI?
Title
ceph: fix potential use-after-free bug when trimming caps
Summary
In the Linux kernel, the following vulnerability has been resolved: ceph: fix potential use-after-free bug when trimming caps When trimming the caps and just after the 'session->s_cap_lock' is released in ceph_iterate_session_caps() the cap maybe removed by another thread, and when using the stale cap memory in the callbacks it will trigger use-after-free crash. We need to check the existence of the cap just after the 'ci->i_ceph_lock' being acquired. And do nothing if it's already removed.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 2f2dc053404febedc9c273452d9d518fb31fde72 , < 2b2515b8095cf2149bef44383a99d5b5677f1831 (git)
Affected: 2f2dc053404febedc9c273452d9d518fb31fde72 , < 448875a73e16ba7d81dec9274ce9d33a12d092fb (git)
Affected: 2f2dc053404febedc9c273452d9d518fb31fde72 , < ae6e935618d99cdba11eab4714092e7e5f13cf7e (git)
Affected: 2f2dc053404febedc9c273452d9d518fb31fde72 , < aaf67de78807c59c35bafb5003d4fb457c764800 (git)
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    Linux Linux Affected: 2.6.34
Unaffected: 0 , < 2.6.34 (semver)
Unaffected: 6.1.28 , ≤ 6.1.* (semver)
Unaffected: 6.2.15 , ≤ 6.2.* (semver)
Unaffected: 6.3.2 , ≤ 6.3.* (semver)
Unaffected: 6.4 , ≤ * (original_commit_for_fix)
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{
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          "programFiles": [
            "fs/ceph/caps.c",
            "fs/ceph/debugfs.c",
            "fs/ceph/mds_client.c",
            "fs/ceph/mds_client.h",
            "fs/ceph/super.h"
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            "fs/ceph/super.h"
          ],
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          "vendor": "Linux",
          "versions": [
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      ],
      "cpeApplicability": [
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          "nodes": [
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              "negate": false,
              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nceph: fix potential use-after-free bug when trimming caps\n\nWhen trimming the caps and just after the \u0027session-\u003es_cap_lock\u0027 is\nreleased in ceph_iterate_session_caps() the cap maybe removed by\nanother thread, and when using the stale cap memory in the callbacks\nit will trigger use-after-free crash.\n\nWe need to check the existence of the cap just after the \u0027ci-\u003ei_ceph_lock\u0027\nbeing acquired. And do nothing if it\u0027s already removed."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-01-05T10:33:19.509Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        },
        {
          "url": "https://git.kernel.org/stable/c/aaf67de78807c59c35bafb5003d4fb457c764800"
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      "title": "ceph: fix potential use-after-free bug when trimming caps",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2023-53867",
    "datePublished": "2025-12-24T10:55:25.430Z",
    "dateReserved": "2025-12-09T01:27:17.829Z",
    "dateUpdated": "2026-01-05T10:33:19.509Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2023-53867\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-12-24T11:15:51.387\",\"lastModified\":\"2025-12-29T15:58:56.260\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nceph: fix potential use-after-free bug when trimming caps\\n\\nWhen trimming the caps and just after the \u0027session-\u003es_cap_lock\u0027 is\\nreleased in ceph_iterate_session_caps() the cap maybe removed by\\nanother thread, and when using the stale cap memory in the callbacks\\nit will trigger use-after-free crash.\\n\\nWe need to check the existence of the cap just after the \u0027ci-\u003ei_ceph_lock\u0027\\nbeing acquired. And do nothing if it\u0027s already removed.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/2b2515b8095cf2149bef44383a99d5b5677f1831\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/448875a73e16ba7d81dec9274ce9d33a12d092fb\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/aaf67de78807c59c35bafb5003d4fb457c764800\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ae6e935618d99cdba11eab4714092e7e5f13cf7e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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